What are the four bases found in DNA and how do they bond.

There are four DNA bases, Adenine (A), Cytosine (C), Guanine (G) and Thymine (T).
On each strand of DNA, the DNA bases are connected by phosphodiester bonds, to form a long chain.
These long DNA strands are paired and mirror each other to form the DNA double helix. The DNA bases pair to their mirrored base in two ways: A-T or C-G.
These paired bases between the DNA strands bond by hydrogen bonds. There are two hydrogen bonds between A-T and three between C-G.

Answered by Toby J. Biology tutor

14600 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Why do mutations makes it difficult to create a vaccine ? (4 marks - has the potential to be worth more in an exam)


What are different animal's cognitive limitations? How can we observe this in the wild?


Describe how you would use a biochemical test to show that a solution contained a protein (2 marks)


Why can enzymes only catalyse one specific reaction?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences